Lakes of Bendakaluru

Satellite view: Esri, Maxar, Earthstar Geographics

Nallurahallikere

ನಲ್ಲೂರಹಳ್ಳಿ ಕೆರೆ

Also called Nallurahalli Lake

Kere, a large tank, in S.M Krishna Ward ward, Bengaluru East

See it on the map
Size
23.1 acresAbout 13 football pitches
Rank by size
395th largestOf 1,621 lakes that still exist
Valley
Koramangala-Challaghatta
Who looks after it
BBMPBruhat Bengaluru Mahanagara Palike
Water quality
Fit only for wildlife and fishTested Jul 2026
Built over
0.8% of the lakeSatellite, 2021. The 2018 survey found 10% encroached.
Campaign
Residents are organising here

Through the years

Nothing on record for 1905 to 1944, 1946 to 1954, 1956 to 1979 and 1981 to 1983.

The records listed below, drawn on one line from 1904 to 2026.

  1. 1904

    Built

    As the 2018 lake survey records it

    See source

  2. 1945

    On the survey map

    See source

  3. 1955

    Not on the U.S. Army map

    Compiled from Survey of India maps of 1945-46

    See source

  4. 1980

    On the survey map

    See source

  5. 1984-2021

    Held water most years

    Water in 32% of all satellite passes, 1984-2024

    28% of its water area has since gone dry; 7% is new water

    4 years not counted: the satellite saw under half the lake

    See sourceSee source

  6. 2017-2025

    Mostly water in most years

    About three in four of these readings are right, so trust what holds for several years

    See source

  7. 2018

    Still there in the 2018 lake survey

    10% encroached, sewage, 54.7 acres surveyed

    See source

  8. 2023-2026

    Tested by the state board in 34 months, most often fit only for wildlife and fish

    Aug 2023 to Jul 2026

    See every testSee source

  9. 2024

    On the state's list of Bengaluru lakes, looked after by BBMP

    See source

  10. 2025-2026

    Mostly open water after the monsoon and in the dry season

    After monsoon, Oct 2025 to Dec 2025

    • 85% open water
    • 6% floating weed
    • 9% dry or built

    Dry season, Mar 2026 to May 2026

    • 55% open water
    • 0.4% floating weed
    • 45% dry or built
    See source

How big it is

The records disagree on its size, so each measure is shown.

Drawn outline
23.1 acres

About 13 football pitches

See source
2018 lake survey
54.7 acres

About 31 football pitches

See source
End to end
655 m

The longest straight line across the outline

See source
Deepest point, 2018
3 m
See source
Kind of lake
Kere, a large tank
See source

How clean the water is

Latest test
Fit only for wildlife and fish

Fit only for wildlife and fisheries. Class D on the state board’s scale from A, the cleanest, to E.

Tested Jul 2026

See source
Class each month, tested 34 times since Aug 2023
Fit only for wildlife and fish: 24 months. Fit only for irrigation: 10 months. Every month is listed in the readings below.
Drinkable after disinfection
Fit for bathing
Drinkable after treatment
Fit only for wildlife and fish
Fit only for irrigation
See source
How it looked in 2018
Sewage
See source
What pollutes it, 2018

Sewage

See source
Sewage flows in, 2018

From the north-west

See source
Older tests
5 readings

From 2011 and 2021

See sourceSee source
Inlet and outlet tests, 2017-18
1 readings
See source
Every reading
Show every reading

Latest test, Jul 2026. Too low to measure: boron, carbonate, nitrite, phenolphthalein alkalinity, phosphate, kjeldahl nitrogen

MeasureUnitValue
Water temperature°C26
Dissolved oxygenmg/L6
pH6.7
ConductivityµS/cm795
BODmg/L4
Nitratemg/L as N3
Faecal coliformMPN/100mL790
Total coliformMPN/100mL2,400
Bicarbonatemg/L116
TurbidityNTU45
Total alkalinitymg/L as CaCO3116
Chloridemg/L184
CODmg/L48
Ammonia nitrogenmg/L as N0.4
Total hardnessmg/L as CaCO3184
Calcium hardnessmg/L as CaCO396
Calciummg/L38.4
Magnesium hardnessmg/L as CaCO388
Magnesiummg/L21.4
Sulphatemg/L71
Sodiummg/L95
Dissolved solidsmg/L546
Suspended solidsmg/L56
Potassiummg/L6
Fluoridemg/L0.4
Sodium share%52
Sodium adsorption ratio3
Orthophosphatemg/L0.23

Every month the state board tested it

MonthClassDissolved oxygenmg/LBODmg/LFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
Jul 2026D647902,400See source
Jun 2026D5.667002,800See source
May 2026E2322,40017,000See source
Apr 2026D5.356302,800See source
Mar 2026E1.9332,7007,900See source
Feb 2026E1.9352402,800See source
Jan 2026D653302,100See source
Dec 2025D4.283904,300See source
Nov 2025E2.3222402,200See source
Oct 2025D6.142202,400See source
Sep 2025E642302,200See source
Aug 2025E3203,30017,000See source
Jul 2025E3.1127,80046,000See source
Jun 2025D5.561701,500See source
May 2025D5.852603,500See source
Apr 2025D5.876303,500See source
Mar 2025E2.51443540See source
Feb 2025E2.4181,40017,000See source
Jan 2025D5.492702,100See source
Dec 2024E2.921170940See source
Nov 2024D74211,600See source
Oct 2024D4.692105,400See source
Sep 2024D6.648,40092,000See source
Aug 2024D6.342605,400See source
Jul 2024D4.1103205,400See source
Jun 2024D4.215321,600See source
May 2024D5101702,400See source
Mar 2024D4.991,70013,000See source
Feb 2024D5.662302,400See source
Jan 2024D6.143,30013,000See source
Dec 2023D6.246,30054,000See source
Oct 2023D5.752,30024,000See source
Sep 2023D5.467,00092,000See source
Aug 2023D5.2631016,000See source

Older tests

DateWhereReadingChloridePhosphateSuspended solidsmg/LDissolved oxygenmg/LCODmg/LNitratemg/L as NTotal hardnessFluoridepHZincManganeseWater temperature°CConductivityµS/cmBODmg/LNitrate and nitritemg/L as NFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
2011Nallurahalli Tank, Inlet3142.2627.57.657.66.754160.418.040.080.21See source
2011Nallurahalli Tank, Middle2941.19019.28.374080.427.920.050.12See source
2011Nallurahalli Tank, Outlet.3161.22148.314000.427.430.050.24See source
2021Nallurahalli Lake, LakeLowest3.66.52437431.23,90024,000See source
2021Nallurahalli Lake, LakeHighest6.56.7258201037,00054,000See source

Inlet and outlet tests, 2017-18 lake survey

DateWhereWater temperature°CpHConductivityµS/cmDissolved solidsmg/LSuspended solidsmg/LTurbidityNTUDissolved oxygenmg/LCODmg/LBODmg/LTotal phosphateKjeldahl nitrogenmg/L as NTotal coliformMPN/100mL
2017-11-30Inlet25.77.5942860110294.61898251,600
See source

How much is built over

Built inside the outline
0.8%

From satellite land cover, 2021

See source
Encroached area, 2017
14.7 acres

Reported by the state legislature’s committee on lake encroachment

See source
Encroached by

The public and government agencies

See source
Taken for

Shed & road

See source
Where it is encroached

On the north-east and west side

See source
Dumped in it

Burning waste, garbage & construction debris

See source
Other problems noted

RTC- Sy no 85 (p1, -p2 is in individual name)

See source
Land record maps
See source
Land within 500 m

56% built, 21% trees, 15% crops, 5% shrubs, 3% grass

From satellite land cover, 2021

See source

Who looks after it

Looked after by
Bruhat Bengaluru Mahanagara Palike

BBMP

See source
City lake page

Open its page on the city’s lake monitoring site

See source
Campaign pages
See source

Where its water comes from and goes

Valley
Koramangala-Challaghatta

The river basin its water drains to

See source
Water comes from
See source
Overflows into

Whitefield Kere

See source
Catchment
2.9 km²

The land that drains into it

See source
Fed by, 2018 survey

Rain & drain

See source
Built parts, 2018 survey

2 inlet drains, 1 overflow weir, 1 sluice gate, 2 culverts, no check dams and no islands

See source
Used for, 2018 survey

Fishing

See source
Nearest sewage treatment plant

Sewage Treatment Plant

1.8 km away

See source

What lives here

Birds recorded
109 species

Most seen: Rose-ringed Parakeet, Common Myna, Black Kite, Indian Pond-Heron and Brahminy Kite.

2,479 sightings, mostly from birdwatchers

See source
All wildlife recorded
116 species

2,486 records, 2016 to 2026

See source
Threatened species seen here
2
  • Indian Roller near threatened
  • Spot-billed Pelican near threatened
See source
Photographed on iNaturalist
38 times

28 species, 29 confirmed by other naturalists.

Most seen: Painted Stork, Indian Grey Hornbill, Rose-ringed Parakeet, Common Myna and Indian Spot-billed Duck.

Last seen Jul 2026

See source
Animals seen, 2018 survey

Birds and butterflies

See source
Water plants, 2018 survey

Emergent

See source
Weed cover, 2018 survey

Partial

See source

Around it

Around it in 2018

Graveyard, vacant land, plantation, shed & apartment

See source

Photos

No photos of it on Wikimedia Commons yet.

Where it is

Ward 33
S.M Krishna Ward

ಎಸ್.ಎಂ ಕೃಷ್ಣ ವಾರ್ಡ್

Bengaluru East corporation, Mahadevapura assembly seat

See source
Village
Nallurahalli

KR Puram hobli, Bengaluru East taluk, Bengaluru Urban district

See source
Land survey numbers

4 (Nallurahalli), 85 (Pattaduru Agrahara)

See source
Height above sea level
880 m
See source
Coordinates

12.9742° N, 77.7360° E

See source

Read more

OpenStreetMap
See source
Its number in each record
ATREE lake map
146
2018 lake survey
BUBEKRnlr_kr1-739
Lake Development Authority
LDA383
KGIS tank map
722
City lake monitoring site
185